12205004238 has 32 divisors (see below), whose sum is σ = 30996837120. Its totient is φ = 3487143960.

The previous prime is 12205004233. The next prime is 12205004239. The reversal of 12205004238 is 83240050221.

12205004238 is a `hidden beast` number, since 122 + 0 + 500 + 4 + 2 + 38 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12205004233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16143808 + ... + 16144563.

It is an arithmetic number, because the mean of its divisors is an integer number (968651160).

Almost surely, 2^12205004238 is an apocalyptic number.

12205004238 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12205004238 is an abundant number, since it is smaller than the sum of its proper divisors (18791832882).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12205004238 is a wasteful number, since it uses less digits than its factorization.

12205004238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32288389 (or 32288383 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

Adding to 12205004238 its reverse (83240050221), we get a palindrome (95445054459).

The spelling of 12205004238 in words is "twelve billion, two hundred five million, four thousand, two hundred thirty-eight".